Acer RB23WABAS service manual Troubleshooting Abnormal OSM display adjust problem

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5. Troubleshooting (continued)

5.6 Abnormal OSM display adjust problem

ACER H233H

 

29

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Check the input I2C signal whether is changed when pressed

function keys on the P306 pin 4, 5

NG

OK

Failure Point

1)Function key wire disconnection.

2)Function key wire is failure.

3)Function key board is failure.

Check the input I2C signal of I308 pin 50, 51 whether is

changed when pressed function keys.

NG

OK

Failure Point

1)Printed wire broke among P306 pin4, R368 and I308 pin51

2)Printed wire broke among P306 pin5 ,R362 and I308 pin50

3)C393, C394 is short.

4)D352, D353 is short

Failure Point

I308 is failure.

Image 30 Acer RB23WABAS service manual Troubleshooting Abnormal OSM display adjust problem
Contents Service Go to cover Scope Video Signal Amplitudes Content Analog input VGA treats all timings as PC-timings Defects 5.1Visual Inspection Diameter, they must be at least 15mm apart Main OSD Menu OSD Volume management OSD Go to cover Exploded Diagram Packing Exploded Diagram Exploded Diagram Product Exploded Diagram Plug in parallel direction Angel 5 degrees S11 S17 S18 S21 Go to cover Open the carton with a proper tool S10 S17 S21 Does OSM display when you push Menu key Next Circuit section Printed wire broke between P301 pin2, R304 and I308 pin Troubleshooting Abnormal screen for VGA Go to cover Troubleshooting Abnormal OSM display adjust problem Troubleshooting Abnormal plug and play operation for VGA Go to cover Troubleshooting Troubleshooting Checking the resolution change IC movement Troubleshooting Checking the DC/DC converter circuit Firmware Upgrade Process Go to cover Ssmeans Samsung Panel Hdmi Transfer DVI Connection Hdmi Transfer DVI Connection Acer H233H Block digram PCB No P01 TO263 ACERLCDH233HSCHEMATICSINTERFACEBDVGA & DDC Input ACERLCDH233HSCHEMATICSINTERFACEDVI & DDC Interface HDMI19P Acer H233H NC/A-POINT 6PIN ACERLCDH233HSCHEMATICSOSD Keybd Ledorange Ledwhite Power Board TOP Silk ACERLCDH233HLAYOUTSINTERFACE Board 1234567